Must this Sakho vs Lovren selection be construed as something of a political war between Rodgers and the committee members who allegedly out-muscled him? Maybe it's simply down to Rodgers thinking Sakho is the better defender in a back three, while Lovren is the better in a duo, after watching games with the analytics team, monitoring training sessions, taking inputs from his staff, Skrtel and Mignolet, etc. - like, doing things we hired him for?
Well, obviously, most of us have no access to any of the above, but we could take a very rough stab at the data part. Let's say we set a benchmark of conceding at most 1 goal per game as an acceptable standard for the defence. Fairly reasonable, as that would give you a record of 38 goals allowed. Not stellar, but *cringe* enough to place you narrowly in the 3rd and 5th positions in the best defensive record league table in 2013/14 and 14/15 respectively.
The numbers given below are arranged in blocks of games (e.g. Sakho started a block of 7 games, then a block of 5, then a block of 5 in 2013/14).
Key:
bold and red = records worse than the 1.0 gpg (goals allowed per game) mark
bold and blue= records equal or better than the 1.0 gpg mark
x games @ y gpg = played x games, and we conceded y gpg
no Sakho/Lovren = no Sakho/Lovren in the starting lineup; they had a few minor sub appearances in there
2013/14 - Sakho : >> 7 games @ 1.43 gpg >> 5 @ 1.2 >> 5 @ 2.0
2013/14 - no Sakho : >> 3 games @ 0.0 gpg >> 4 @ 1.75 >> 9 @ 1.33 >> 4 @ 1.0 >> 1 @ 1.0
2014/15 - Sakho : >> 3 games @ 1.33 gpg >> 9 @ 0.78 >> 3 @ 2.0 >> 1 @ 6.0
2014/15 - no Sakho : >> 2 games @ 2.0 gpg >> 11 @ 1.27 >> 3 @ 0.33 >> 6 @ 1.0
2014/15 - Lovren : >> 12 games @ 1.8 gpg >> 1 @ 3.0 >> 3 @ 0.33 >> 6 @ 1.0
2014/15 - no Lovren: >> 3 games @ 0.33 gpg >> 9 @ 0.78 >> 3 @ 2.0 >> 1 @ 6.0
Summary:
2013/14 - Sakho : 0 / 17 games equal or better than mark
2013/14 - no Sakho : 8 / 21 games equal or better than mark
2014/15 - Sakho : 9 / 16 games equal or better than mark
2014/15 - no Sakho : 9 / 22 games equal or better than mark
2014/15 - Lovren : 9 / 22 games equal or better than mark
2014/15 - Lovren : 12 / 16 games equal or better than mark
We met the mark in 9 / 33 games Sakho's started. Lovren? 9 / 22.
We met the mark in 17 / 43 games Sakho didn't start. 12 / 16 when Lovren doesn't.
The numbers don't say Sakho is better. Yes, I know, they're just numbers - but numbers are a source of input these days so we have to give them the due recognition that they'll sway decisions.
All right, so how about context then? Everyone's (rightly) talking about stats and context these days, so let's put some context into it and see what happens. Look at Sakho's only run of games in 2 seasons meeting the 1.0 mark. Right, that block of 9 games @ 0.78 gpg in 2014/15. Know what that coincides with? Our three-at-the-back system. Take his numbers from outside that system, and we never met the 1.0 mark.
How about for Lovren? He put in a small, good block in the three-back system (3 @ 0.33) but was atrocious in a two-back system in the run of 12 games to start the season - 12 @ 1.8! OMG... the worse Sakho ever did in a CB pair and in a block of more than 5 games was 1.43... Saving grace for Lovren - that block of 1.0 gpg in the 6 games before Stoke. His stats are blessed by him missing that game, the lucky bitch. Anyway, from transfermarkt - we played two at the back in 5 of those 6 games and conceded 2 goals. The game against Palace - we went to three at the back and shipped 3 goals at home.
So what does this all mean? It means that one factor of one factor in the decision-making process - if you believe there's a scientific one besides a bunch of pricks in petty squabbles with one another - i.e. one particular cut of the numbers, does not bear out the "fact" that Sakho is better than Lovren (nor does it argue otherwise). It suggests though, that to make good use of Sakho, we should play a back three, and Lovren was a cunt in the first half of the season, but maybe half a cunt in the second half.
Fuck, I think I need to get some more sleep. 😀